Exercise device



FIG. 1 is a perspective view of an exercise device showing our new design;

FIG. 2 is a top plan view thereof.

FIG. 3 is a bottom plan view thereof.

FIG. 4 is a right side elevational view thereof.

FIG. 5 is a left side elevational view thereof.

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a front elevational view thereof.

The broken lines illustrate environmental elements of an exercise device which forms no part of the claimed design. 

CLAIM The ornamental design for an exercise device, as shown and described. 